Improvement in sewer-traps



Patented Feb 9.

UNITED STATES PATENT QFFICE JOHN P. CAHILL, OF OAKLAND, CALIFORNIA.

lMPROVEMENT IN SEWER-TRAPS.

Specification forming part of Letters Patent No. 212,352, dated February 18, 1879; application filed November 11, 1878.

To all whom it may concern:

Be it known that I, JOHN P. ()AHILL, of Oakland, in the county of Alameda and State of California, have invented certain new and useful Improvements in Sewer-Traps, of which the following is a description,reference being had to the accompanying drawings and the letters marked thereon.

Figure 1 is a perspective elevation Fig. 2, the air-chamber; and Fig. 3, a section showin g the trap-basin, the discharge, and overflow-pipe.

The following is the construction of the same: A represents the air-chamber and cap for the trap-basin. It is constructed of glass, and screws down to the trap-basin. B is the trap-basin. O is the trap-discharge or standpipe. Dis the overflow-pipe and E the washbasin discharge pipe, connecting the same with waste and discharge pipes. The pipe E has a coupling upon the top to connect with the wash-basin or other basin.

The following is the operation of the same: The water being introduced through the pipe E, or coming directly through the overflowpipe D, enters the trap-basin B, and rises to the top of the stand-pipe O, and, flowing down through the same, is discharged, leaving the air-vessel'A filled about to the level with the top of the trap-discharge or stand-pipe G. Then, being in direct contact with the air, the elasticity of the same allows the column of water to drop down without siphoning the water from the trap-basin.

By placing a nozzle in the overflow-pipe, at the outer end, every particle of sand or other heavy substance is thrown down through the stand-pipe (l, leaving the trap-basin perfectly clean; but in case it becomes necessary to clean out the trap-basin the air-chamber and cap A is unscrewed and taken off, and easy access is had to every part of the trap.

The air-chamber A is designed to be constructed with any suitable shoulder at the top of the screw to receive packing-rin g.

The following are the advantages of the same: Simplicity of construction; the readiness with which it may be kept clean, requiring no vent-pipes. The connection is simple. It requires no valve, and cannot be siphoned out by any action of the water in the standpipe, having been fully tested by the action of a strong suction-pump attached to the bottom of the stand or trap-discharge pipe 0. In case the stand-pipe or discharge is to be clcanedout, the cap A is unscrewed and a pump attached to the top of the stand-pipe G, and everythin forced out clean into the sewer.

Having thus described my invention, what I claim is- The overflowpipe D, discharge-pipe E, provided with the trap-basin B, and trap-dis charge pipe G, extending above said basin and below the overflow-pipe, in combination with the detachable air-chamber A, the whole constructed to operate substantially as and for the purpose set forth.

7 JOHN P. GAHILL.

W'itnesses JEFF FOWLER, JOHN H. REns'roNE. 

